lib: harden kKeyOps lookup with null prototype

[panva]

validateKeyOps(['sign', 'toString', 'constructor']) was throwing DataError before when it should instead ignore unrecognized values.

[nodejs-github-bot]

Review requested:

• @nodejs/crypto

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.61%. Comparing base (b2248fd) to head (c7294ee).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #62877   +/-   ##
=======================================
  Coverage   89.61%   89.61%           
=======================================
  Files         706      706           
  Lines      219144   219166   +22     
  Branches    41985    41999   +14     
=======================================
+ Hits       196391   196413   +22     
+ Misses      14629    14627    -2     
- Partials     8124     8126    +2     

Files with missing lines	Coverage Δ
lib/internal/crypto/util.js	95.52% <100.00%> (+0.12%)	⬆️

... and 27 files with indirect coverage changes

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[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/72840/